Flashing hazard lights when locking car

It's telling you your siren is broken... and possibly something is not latched properly (bonnet, boot, door switch faulty?).

 

Right, Ian.

Bedrari, refer to sections I0 - I4 in the Alarm System Manual...

 

I believe a faulty anti-jacking sensor can also cause these issues. I'm not sure where it is located on a 550

There are two different types:

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WSM location guide is a bit vague...

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If you close the doors and lids (with the ignition key on), you should be able to see if they are still showing open on your instrument panel.

 

If you need a new siren, you can do the same thing I did and use one of Mark's GM units reflashed with Ferrari software.
ferrarifobs.com

 

Terry is the stock corvette alarm not plug and play as is. My car being Swiss doesn’t flash lights or chirp, the interior dome light is the only indication of fob button having been pushed.

 

The programming seems to vary on the GM alarms. You may get one which doesn't behave in the way Ferrari intended. The flashing lights, I assume, are a function of the Immobiliser ECU, but I'm not sure about the chirping and LED light behaviour.

It's probably best to contact FChatter @gobble of "Ferrarifobs".

 

The security system is programmed differently for different countries to comply with national laws. Some countries do not allow sirens or audible warnings.
There is a whole list of different programs.

 

The big problem with the unaltered GM sirens is that some do not go off when they should. Kind of defeats the purpose of having an alarm. Like Brian said, the alarm ECUs/immobilizers vary, not the Ferrari siren.